Method to reduce the commutation loss in a motor inverter
US11368111B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 3, 2020 |
| Grant date | Jun 21, 2022 |
| Priority date | — |
| Expiry date | Mar 3, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P27/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit comprises a multiphase gate driver to be coupled to a multiphase inverter for driving a multiphase motor. For each phase, the multi-phase gate driver is to, in accordance with a pulse width modulation (PWM) control signal, turn on and off a high side transistor of a given pair of high and low side transistors of the multiphase inverter, discontinue the PWM control signal turn to the high side transistor of the given pair and turn off the high side transistor of the given pair, and turn on the low side transistor of the given pair until a current level through the low side transistor falls below a threshold, at which time, turn off the low side transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.